Intake nozzle



June v14'; 1927. 1,632,196

l H. E. RHoADs INTAKE uozzma Filed sept. v; 1920 Patented June 114, i927.V

ienne PATENT crimes.'

HARRY E. RHGADS, OF TOLEDO, OHIO, ASSIGNOR TO THE WILLYS-OVERLANI) COIWL-` PANY, OF TOLEDO, OHO, A CORPORATION OF OHIO.

INTAKE NOZZLEl My invention relates to improvements in intake nozzles and particularly relates to improved means tor feeding gas to an internal combustion engine.

@ne ot the objects of my invention is Ithe provision ot means permitting the use ci a leaner mixture. l

Another object of my invention is to cause an acceleration oi gases passing through the intake valve chambers ot the engine, one purpose being to prevent condensation of the heavier particles,

Another object of my invention is the provision ot a ineans tor retarding certain par ticles of the gas in order to thoroughly commingle them with the more accelerated par ticles oi gas in the intake valve chamber.

Still another object of the invention is to provide a means located in the intake valve chamber and in close proximity to the intake valve to cause a rapid flow of gases to the engine.

Further objects vont the invention relate to economies 'ol manufactureV and details of construction, as will hereinafter appear from the description to follow.

The objects ot the invention are accomplished in one instance bythe devices and means described in the following specification, but it is evident that the same may be varied without departing from the scope of the invention as pointed out in the appended claims.

A structure constituting one embodiment of `the invent-ion which may be the preferred is illustrated in the accompanying drawing Yforming a part ot the specification in which: l

Figure I is an elevation of an engine partly in section showing an embodiment of my intake nozzle.

Figure Il is a vertical section of an intake port showing another embodimentof my invention. Y

Figure lll is a. vertical section of an intake port showing still another modification ot the nozzle.

Like reference characters refer to similar parts throughout the several views of the drawing.

In the preferred embodiment of my invention, l designates 'an L-type multi-cylinder engine having a cylinder 2, combustion space 3 and an intake port 4l with a poppet valve 5 controlling the admission of `gases to the engine from the intake manifold 6. Thev intake manifold receives mixture'thru a conduit 7 passing between the cylinders and a carburetor 8. Heated air is supplied to the carburetor thru a conduit 9. An intake nozzle l() projecting through the intake port is held in position by means of a shoulder ll on the nozzle placed in a groove l2 formed at the intersection `of the manifold with the intake port.. From the shoulder ll the nozzle projects inwardly into a valve chamber 13m the shape of a truncated cone lll, said cone lll forming a venturi having a narrow inner end l5 partially closed by an annular flange or baiile 16.

The nozzle 17 in Figure Il, another embodiment 4ot my invention, is similar to the nozzle of Figure I except that no annular flange partially encloses the inner end 18 of the nozzle. rl'his elimination ot' a flange or baille requires a greater inclination in the sides 19 of the nozzle in order to reduce the opening to a size such as to insure a proper acceleration lof gases passing through the nozzle. V

A similar effect 'will result in still another modiiication as shown in Figure III. A ring 2l placed in the groove 12 at the intake port d is partially closed by ya liangc or battle 2 2, the flange having an opening therein per mitting the `gases to be drawn into the intake valve chamber. c f,

rlhe operationof my device is as' follows:

When a column of gas is drawn by suction thru the manifold and reaches one of the, intake ports oi" the several clyinders, it must pass through the nozzle located at that port. The baille or flange on the nozzle checks the flow of gases traveling along the periphery of the column and causes them to surge inwardly towards the center providing Jfor a more intimate mixture. The inner and outer particles of the column of gas are diilerent-ially accelerated when they reach the nozzle due to pressure at the narrow opening in the flange, and the gases pass rapidly from the valve chamber to the engine.

The nozzle is adapted to be inserted in the intake valve chamber directly in front of the intake valve and as previously stated, its'function is to accelerate or speed up the flow of gas as it passes into the combustion chamber. The nozzle or baillel is adapted for use in internal combustion engines equipped with any type of carburetor and serves to eliminate the building up of heavy particles of fuel in the intake manifold and valve chamber especially when the engine is idling or running atA low speed. It is well known that when internal combustion engines are idling' or are ruiming at comparatively low speeds, that the suction or vacuum created by the piston in the combustionv chamber is no sufficient t-o draw up and properly mix the heay particles offuel, and that the same will condense in the intake manifold and throat of the carburetor. Upon speeding up the engine, these heavy particles of fuel will beV drawn in-tothe engine and will result in either killing the engine or improper combustion.` Because of the restricted opening in the nozzle, the fuel will be drawn into the combustion chamber with an increased velocity, thus relieving the building up of raw fuel in the manifold. Further, the lighter particles of gas will be readily drawn through the opening` in the baille or flange and the heavierv particles will be thrown against the end wall or baille of the nozzle, thus retarding the same and causing them to become thoroughlymixed with the lighter particles before fuel is admitted to the combustion engine.

Because the heavy particles of fuel are thoroughly mixed with the lighter fuel and because the fuel is drawn into the combustion chamber at increased velocity, it will be readily seen that a leaner mixture is rethe crowding` of gases in the nozzle provides forV a more intimate mixture and the venturi effec-t in the nozzle causes an acceleration of the mixture to the engine. Thus a rapid discharge of an intimate mixture takes place directly in the intake valve chamber.

The forms ofthe device shown in Figs. I and III are preferable to that'shown in Fig. II because of the flanges or shoulders 16 and 22 respectively. rlhese shoulders which are substantially at rightA angles to the gas flow direct the liquid fuel deposited on the walls of the manifold, toward the center of the accelerated gas stream and the edges of the shoulders act as collectors fromy which the fuel is forcibly directed toward the engine. The shoulders may be formed integral with the manifold and accomplish the same result but the device herein described is adaptable to existing engines in which condensation anddistribu-v tion troubles are present.

` While I have shown and described my invention in more or less detail,y and as being embodied in certain precise forms, I do not Ydesire or intend it to be limited thereto, as on the contrary, my invention contemplates broadly all proper changes as well as the said nozzle being shaped. like a truncated cone and having an annular baffle located on the smaller end. Y

2. An internal combustion engine, having an intake manifold for conducting fuel to the engine, an intake port, an intake valve chamber, a groove formed at the intesection of the manifold and the port, an intake nozzle projecting into said chamber and provided with a shoulder located in said groove, and a flange located on said nozzle for causing a surging and an acceleration of the fuel passing from the chamber.

3. An internal combustion engine, having an intake manifold for conducting fuel to the engine, an intake port, an intake valve chamber, a groove formed at the inters'ec tion vof the manifold and the port, an intake nozzle projecting into said chamber and provided with a shoulder located in said groove, the said nozzle being shaped like a truncated cone and having the smaller end partially closed.

ll. In an internal combustion engine, a cylinder provided with an intake valve chamber, a valve at the discharge end of said chamber, and a cone-shaped nozzle positioned within said chamber and adapted to accelerate the iiow of fuel therethrough when the valve is open, said nozzle having a portion .adapted to direct the flow of the heavier particles of fuel passingV along its walls into the stream flowing through the nozzle.4 f l In testimony whereof, I affix my signature.

HARRY E. RI-IOADS. 

